A waveguide microstrip line converter includes a waveguide, a dielectric substrate, a ground conductor including a slot, and a line conductor. The line conductor includes a first section that is a microstrip line having a first line width, a conversion unit that is a second section positioned immediately above the slot and having a second line width greater than the first line width, and a third section extending from the second section in a first direction and performing impedance matching between the first section and the second section. One of the opposite ends of the third section in the first direction is connected to the second section. The first section extends in a second direction perpendicular to the first direction continuously from the other end of the opposite ends of the third section.

Improved waveguides, transitions, and conductors for propagating electromagnetic energy. A device includes a waveguide port, two or more coaxial waveguides, and a transition disposed between the waveguide port and the two or more coaxial waveguides. The transition combines or divides electromagnetic energy propagating between the waveguide port and the two or more coaxial waveguides.

A transceiver includes an antenna configured to transmit a first wireless signal based on a transmission signal and receive a second wireless signal, the second wireless signal including a reflected first wireless signal from an object and the antenna transmitting the first wireless signal and receiving the second wireless signal at the same time. A transmission circuit is configured to generate the transmission signal and output the transmission signal to a first side of the antenna. A reception circuit is configured to receive a reception signal from a second side of the antenna, the antenna outputting the reception signal based on the second wireless signal. The first side is different from the second side.

An antenna structure serving as a radar emitter with extended long range function comprises a radiating element comprised of radiating units connected in series by a feeder. Each two adjacent radiating units are spaced apart from each other by a specified distance. Lengths of the radiating units are same, and width of the radiating units gradually decreases from a center to ends. The feeder transmits a current signal to the radiating element. The radiating element emits a radar beam based on the current signal.

A low-cost implementation and a simplified digital signal control and synchronization for a multi-beam phased-array antenna is proposed. In a preferred embodiment, the multi-beam phased array antenna is implemented with a stack-up comprises 1) an antenna substrate aperture containing embedded antenna elements and a third layer of the signal combiner/divider and distribution network, 2) interposer substrate providing a second layer of the signal combiner/divider and distribution network and the carrier of BPU ICs, and 3) the BPU ICs containing the plurality of phased-array frontend processing unit and a first layer of the signal combiner/divider and distribution unit. In one advantageous aspect, the invention is to combine the third layer of the signal combiner/divider and distribution network with the antenna onto the same substrate, eliminating the use of expensive miniature high frequency connectors.

A multiband waveguide feed network includes multiple transmit (TX) magic tees, multiple receive (RX)-reject waveguide filters configured to reject RX frequencies, and multiple branch-line couplers configured to couple the plurality of RX-reject waveguide filters to the plurality of TX magic tees. The multiband waveguide feed network includes a quadrature junction coupler configured to couple the plurality of RX-reject waveguide filters to an antenna port. The multiband waveguide feed network is configured to be fabricated in four pieces with three split planes, and the multiband waveguide feed network is circularly polarized.

A linear multiband waveguide feed network device, which includes a first section, a second section, a third section and an inverse-ridge receive (Rx)-reject filter. The second section is coupled to the first section via a first split-plane. The third section is coupled to the second section via a second split-plane. The inverse-ridge Rx-reject filter is implemented as a first half-portion and a second half-portion. The first half-portion and the second half-portion are implemented in the second section and the third section, respectively. The first split-plane and the second split-plane are on a zero-current region of the device.

In an example embodiment, an azimuth combiner comprises: a septum layer comprising a plurality of septum dividers; first and second housing layers attached to first and second sides of the septum layer; a linear array of ports on a first end of the combiner; wherein the first and second housing layers each comprise waveguide H-plane T-junctions; wherein the waveguide T-junctions can be configured to perform power dividing/combining; and wherein the septum layer evenly bisects each port of the linear array of ports. A stack of such azimuth combiners can form a two dimensional planar array of ports to which can be added a horn aperture layer, and a grid layer, to form a dual-polarized, dual-BFN, dual-band antenna array.

A spherical reflector antenna, including a sphere with a reflective surface opposite a transparent surface, a feed system that receives electromagnetic waves that (pass through the transparent surface at a beam angle) and are reflected off the reflective surface at a beam angle and outputs electromagnetic waves that are reflected off the reflective surface (and pass through the transparent surface at a beam angle), and beam steering electronics that identify a position of the spherical reflector antenna, identify an orientation of the sphere, and adjust the beam angle of the feed system based on angle from the position of spherical reflector antenna to the target relative to the orientation of the sphere.

An antenna assembly includes a dielectric substrate, wherein a first surface of the dielectric substrate includes a ground plane and a closed clearance region located in the ground plane; a first antenna unit and a second antenna unit, the first antenna unit and the second antenna unit being spaced apart on the first surface of the dielectric substrate and located in the closed clearance region, and the first antenna unit and the second antenna unit being orthogonally arranged; a radio frequency chip, arranged on the dielectric substrate and connected with the first antenna unit and the second antenna unit respectively; and a metal resonant cavity, arranged on a second surface of the dielectric substrate, wherein in a direction perpendicular to the second surface, at least a part of a projection of the closed clearance region on the metal resonant cavity is within an outer contour of the metal resonant cavity.